Power loom for the manufacture of oriental, persian, wound, and other knot-stitch carpets



lIIlll lIlIllll P. AND A. RENARD. POWER LOOM FOR THE MANUFACTURE OFORIENTAL, PERSIAN, WOUND,

. AND OTHER KNOT STITCH CARPETS. L M FfiSQQ APPLICATION FILED JULY 2.I922.

Patented Dec. 5, 1922.

2 SHEETSSHEET l.

1 l Il P. AND A. RENARD. POWER LOONI FOR THE MANUFACTURE OF ORIENTAL,PERSIAM'WOUND,

AND OTHER KNOT STITCH CARPETS. APPLICATION FILED JULY 2.1922.

1,431,682,, v Patented Dec. 5, 1922.

2 SHEETS -SHEET 2.

Patented 5, i922.

re trier...

PIERRE RENARD AND ALBERT REI IARD, OF NONANCOURT, FRANCE.

rowan LOOM ronrnn mannracrnnn or ORIENTAL, PERSIAN, WOUND, AND crimeimor-srrrcn oiinrnrs.

Application filed July 2, Serial No. 393,765.

(GRANTED UNDER THE PROVISIONS OF THE ACT OF MARCH 3, 1921, 41 STAT. L,1313.)

To (14% whom it may concern: I

Be it known that we, PIERRE RnNAnD and ALBERT RENARD, both citizens ofFrance, and

residents of Nonancourt, Furs, France, have invented certain new anduseful Improvements in Power Looms for the Manufacture of Oriental,Persian, Wound, and Other Knot-Stitch Carpets (for which we have filedapplications for. patents in France, October 31, 1913, No. 474,098;Holland, Jany. 1914, No. 2390 England, March'8, 1917, No. 104690; andinSpain, Jany. 21, 1920, not granted), and of which the following is aspecification.

As set. forth in United States Patent No.

894,287 forpower loom ior'themanut'acture of tufted pile fabrics and inPatent No. 969,-

565,'for loom for weaving oriental and other knotstitoh carpets, theformation of a knot for oriental carpet on the loom. depends upon adistributer and a lrnotting apparatus.

Under the action of the jacquard patterns,

that is according to the design to be reproduced, the distributor bringsthe pile thread from the various colored bobbins to the con tre ofdistribution whence "it is'drawnwout by a distributing gripper whoselength cor- The knotting apparatusseizcs this portion of the drawnthread which is out oh? by shears at the distributing point, and knotsthesame upon the warp threads which are separated and stretched by adivider in thelrnown manner.

In the first of the patents itlJOVGLIIlGlltioned, No. 894,287, theelements of the 100111 have a considerable size. A considerable spacingis found necessary in order to dispose the mechanism o'fgrippers, shearsand divider between the distributers. "This'space occupied. naturallylimited the number of.

distributors and knotting apparatus on" a loom, and the output wasingly.

The dispositions of Patent l lof969,565. already enabled the reductionof thespace occupied by the elements and particularly by the sheersdisposed upon the looping dereduccd accordvice itself, but this washowever not sufficientto provide for a large output."

"The present invention is intended to eliminate all mechanism betweenthe'distributers so as toreduce their spacing'tothe minimum represented bythe'length of the stroke of the distributing gripper.

Under these conditions, it will be readily oberved that as the pile ofthe carpet betributed is longer, whence a less number of distributerscan be mounted on the loom;

conversely,- as the pile becomes shorter, a

jgreaternurnber of apparatus can be disposed on the loom. 1

the supports of the grippers and their mechshaft of the dividers are imounted;

anisms and the Figs. 6, 7, 8 and 9 are detail viewsshewing howa d vider15 mounted and controlled.

comes thicker, the pile thread to be dis- Referring to Figs. 1 and 2, 1is a distributor with converging blades 2; 3 is a distributing gripper,4 is a divider, 5 the shaft thereof and batten T. p

Between two adjacent distributors 1; 1, there are nomechanical parts,thespace be-. ing exclusively reserved for the passage of the threads to bedistributed;

f-The gripper 3 is indicated on Fig. 2 only 'by its centre ofoscillation 8 and by the lines 9, 10,.indicating the position which it"has on the one hand when it seizes the pile thread and on theother handwhen it has fully extended the latter; these lines are in sorted to showthat the divider 4 has to oscilsuitably above that or the centre 12ofdisstages of operation; it passes'thro'ugh the meshes139 of a set ofthreads 38 controlled by the jacquard device and which raises the 6 isthe reed mounted on the I 5 or is otherwise fixed in the shaft.

same in the known manner. K. Y show the warp the inoperative position; X-Y show it as raised by the divider above the centre of distribution 5X[ show it in the stretched position when the stitch is locked; thisoperation is set forth in the above named patents. I

A number of frames 13 are arranged at suitable distances apart along thewidth of the loom for supporting the distributors and the grippers andtheir mechanismsand also to serve as bearings for the shafts of thedividers. They have slots 14; and notches 15 and 16, for receiving fixedand movable bars, and holes 17 through which extends the shaft of thedividers.

In notches 15 is fixed, extending along the width of the loom, a bar 18which receives the pivots 19 of small fiat levers 20, each carrying twopins 21, 22 on. which are threaded the eyes of the arms 23, 24. of thecorresponding gripper. In the notches 16 can slide a bar 27 parallel tobar18; to this bar 27 a cam imparts a longitudinal reciprocatingmovement and it carries fixed stops 25; in one direction of the movementeach of these stops operates a lever 20 to open the gripper. In themovement in the contrary direction a spring '26 (Fig. 3) closes thegripper.

In this construction, by adjusting suitably the stroke of the bar 27 andthe tension of the spring 26, each gripper may have independent lockingon each pile thread distributed.

The aforesaid oscillation of gripper represented by lines 9 and 10 (Fig.2) is due to a bar 28 in which are embedded small stirrups 29 embracingeach a gripper and held in position by screws 30. This bar is parallelto bars 18 and 27 and like the latter has a longitudinal reciprocatingmovement due to a cam.

The stirrup 29 serves not only'for moving the gripper but also foradjusting its level so that the centre of the locking of the pile threadcorresponds with the centre of distribution. I

In Fig. 3 the ends ofthe two arms of the stirrup embedded in the'bar 28are seen in plan. The screw which. retains them and permits theaforesaid adjustments is not shewn.

Each divider has a cylindrical spindle 31 adapted to turn in a sleeve 32which is driven into a transverse bore in the shaft This spindle carriesat its end a pinion 33 accommodated in a cavity 34 milled in the shaft5. This pinion is engaged with a rack 35,

also fitted in the shaftandreceiving a longitudinal reciprocatingmovement from a cam through a suitable device mounted -00- axially withthe shaft and allowing for the OSC1ll2it1OI1-Of the latter on its axis.

The mechanism for rotating the divider is thus placed within the shaftand presents no exterior projection.

The sleeve 32 provides a long bearing for the divider, but it is notessential since the spindle 31 may turn in the bore in the shaft. Ifsleeves 32 are used the holes 17 in frames 1 3 should be extended byslots 36 for passage of the sleeves in mounting the shaft.

By the construction described, two part hearings on the frames, whichare of little thickness, are avoided and the space occupied in the widthof the loom is reduced. The dividers can only be mounted when the shaftitself is in place.

The arrangement within the shaft of the mechanisms controlling therotation of-the dividers constitutes the best construction, for then thegripper can be brought as close as possible to the shaft and there is noprojection preventing the arrangement of the gripper tangentially to theshaft; the latter turns normally in the frames without impeding thereciprocation of the rack. This rackis retained merely by small capsplaced at suitable distances apart on the shaft, each between twogrippers, that is to say, without impeding the function of the grippers.

However, it is not essential that the pinions and the rack should bethus arranged; they might project above the shaft, but this modificationwould be to the detri ment of the position of the gripper which wouldhave to be inclined at a greater angle to the horizontal; also thebearings of the shaft of the dividers in the frames shewn in Fig. 5would have to be altered in order to allow the projecting rack to pass.

The notch 37 extending along the whole width of the gripper above theshaft of the divider, permits the lowest possible level for the gripperand its opening and closing mechanism, without injury to its strengthand eificient operation.

Having thus described the nature of our said invention and the bestmeans we know of carrying the same into practical effect,

we'claim:

1. In a power loom of the character described, pile thread distributorsarranged to permit the free distribution of the threads between them,means including a gripper to distribute the pile thread below eachdistributor in substantially a horizontal direction, anda warpdividerarranged belowand in the same vertical plane as the gripper and adaptedto oscillate in an angular space determined above its axis by the twoend positions of the gripper when it seizes the pile and when it hasfully extended the latter.

2. Ina power loom as claimed in claim 1, means to reciprocate thegrippers comprising a horizontally reciprocating bar, and

stirrups on the bar embracing the gripper.

8. In apower loom as claimed in claim i, an 1 in which each.distributing gripper has two gripping arms on one end, means for openingand closing the arms comprising oscillating levers eccentrically pivotedto said arms, a horizontally reciprocating bar and means on the bar tooscillate said levers.

4:. In a power loom as claimed in claim 3, and in which the means foroscillating the levers comprise pins on the horizontal bar adapted toengage and move the levers in one direction and springs connecting thebar and levers to move the latter in the 0pposite direction during thereciprocations of the bar.

5. In a power loom as claimed inclaim i 1, a bearing shaft for the warpdividers provided with recesses in Which the dividers are rotatablymounted, pinions on the dividers, and a rack reciprocally mountedtin theshaft in mesh with the pinions. v In Witness whereof, We have hereuntosigned ournames.

' PIERRE RENARD.

ALBERT RENARD.

